In general, the structural properties of steel tubes, which are determined by the external economic structure of alloy tubes, are unexpectedly determined by structure strengthening. After the cold-rolled alloy steel tube is cold-rolled, with the change of the cooling natural environment, the various martensite, austenite and other structural structures in the structure have also changed, which has also led to great changes in the structural properties of the steel tube. According to this method, a large number of steel tubes with compressive strength blocking grades can be obtained to meet different performance requirements.

1. The tissue strengthening must be the parent phase, that is, the elements in the steel tube must be the parent phase that produces the tissue strengthening.

2. Tissue strengthening is a whole process, including tissue deformation and extra-tissue diffusion. With the change of the cooling natural environment, the microstructure of the alloy steel tube may change in two ways, namely external diffusion and external diffusion. In the ultra-low temperature natural environment, the outer diffusion determines the whole process of tissue deformation; in the high temperature natural environment, the outer diffusion determines the change of the tissue structure.

3. There are two key factors in tissue strengthening, namely tissue resilience and natural environment cooling. For example, in the heating natural environment or the cooling natural environment, the structure of the alloy steel tube will change slowly with the change of temperature, and the kinetic energy will change from low to high. In addition, the spot transaction of steel tubes can be inquired in aluminum alloys.

In steel tubes, a small amount of material has a very fine relative density. Therefore, when adjusting the structural properties of steel tubes, attention should always be paid to the microstructure and properties of alloy steel tubes.